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| 1 | +// Copyright The OpenTelemetry Authors |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | + |
| 4 | +package exporterqueue // import "go.opentelemetry.io/collector/exporter/exporterqueue" |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "sync" |
| 9 | + |
| 10 | + "go.opentelemetry.io/collector/component" |
| 11 | +) |
| 12 | + |
| 13 | +// boundedQueue blocks insert until the batch containing the request is sent out. |
| 14 | +type disabledQueue[T any] struct { |
| 15 | + component.StartFunc |
| 16 | + *sizedQueue[disabledMemQueueEl[T]] |
| 17 | + |
| 18 | + mu sync.Mutex |
| 19 | + nextIndex uint64 |
| 20 | + doneCh map[uint64](chan error) |
| 21 | +} |
| 22 | + |
| 23 | +type disabledMemQueueEl[T any] struct { |
| 24 | + index uint64 |
| 25 | + req T |
| 26 | +} |
| 27 | + |
| 28 | +// QueueSettings defines internal parameters for boundedQueue creation. |
| 29 | +type disabledQueueSettings[T any] struct { |
| 30 | + sizer sizer[T] |
| 31 | + capacity int64 |
| 32 | +} |
| 33 | + |
| 34 | +type disabledQueueSizer[T any] struct { |
| 35 | + sizer sizer[T] |
| 36 | +} |
| 37 | + |
| 38 | +func (s disabledQueueSizer[T]) Sizeof(item disabledMemQueueEl[T]) int64 { |
| 39 | + return s.sizer.Sizeof(item.req) |
| 40 | +} |
| 41 | + |
| 42 | +// NewBoundedQueue constructs the new queue of specified capacity, and with an optional |
| 43 | +// callback for dropped items (e.g. useful to emit metrics). |
| 44 | +func NewDisabledQueue[T any](set disabledQueueSettings[T]) Queue[T] { |
| 45 | + return &disabledQueue[T]{ |
| 46 | + sizedQueue: newSizedQueue[disabledMemQueueEl[T]]( |
| 47 | + set.capacity, |
| 48 | + disabledQueueSizer[T]{sizer: set.sizer}, |
| 49 | + true /*blocking*/), |
| 50 | + doneCh: make(map[uint64](chan error)), |
| 51 | + } |
| 52 | +} |
| 53 | + |
| 54 | +// Offer is used by the producer to submit new item to the queue. It will block until OnProcessingFinished is called |
| 55 | +// on the request. |
| 56 | +func (q *disabledQueue[T]) Offer(ctx context.Context, req T) error { |
| 57 | + q.mu.Lock() |
| 58 | + index := q.nextIndex |
| 59 | + q.nextIndex++ |
| 60 | + done := make(chan error) |
| 61 | + q.doneCh[index] = done |
| 62 | + |
| 63 | + if err := q.sizedQueue.Offer( |
| 64 | + ctx, |
| 65 | + disabledMemQueueEl[T]{req: req, index: index}); err != nil { |
| 66 | + delete(q.doneCh, index) |
| 67 | + q.mu.Unlock() |
| 68 | + return err |
| 69 | + } |
| 70 | + q.mu.Unlock() |
| 71 | + err := <-done |
| 72 | + return err |
| 73 | +} |
| 74 | + |
| 75 | +func (q *disabledQueue[T]) Read(_ context.Context) (uint64, context.Context, T, bool) { |
| 76 | + ctx, item, ok := q.sizedQueue.pop() |
| 77 | + return item.index, ctx, item.req, ok |
| 78 | +} |
| 79 | + |
| 80 | +// OnProcessingFinished unblocks unblocks offer. |
| 81 | +func (q *disabledQueue[T]) OnProcessingFinished(index uint64, err error) { |
| 82 | + q.mu.Lock() |
| 83 | + defer q.mu.Unlock() |
| 84 | + |
| 85 | + q.doneCh[index] <- err |
| 86 | + delete(q.doneCh, index) |
| 87 | +} |
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